Illumination arrangement, multiple light module, luminaire and use thereof

• US 8,070,315 B2
• Filed: 01/17/2008
• Issued: 12/06/2011
• Est. Priority Date: 01/17/2007
• Status: Expired due to Fees

• Current Assignee: OSRAM Licht AG (Ams-Osram AG)
• Original Assignee: OSRAM GmbH (Ams-Osram AG)
• Inventors: Schroll, Katrin
• Primary Examiner(s): Lee, Diane
• Assistant Examiner(s): Zettl, Mary
• Application Number:
  US12/009,544
• Publication Number:
  US 20080212322A1
• Time in Patent Office: 1,419 Days
• Field of Search: 362/231, 362/236, 362240-243, 362/246, 362/246.02, 362/296.02, 362/296.04, 362/298, 362/311.02, 362/311.06, 362/311.1, 362/311.14, 362/471, 362/555, 362/558, 362/558.9
• US Class Current: 362/243
• CPC Class Codes: B60Q 3/43 General lighting
• CPC Class Codes: F21K 9/69 Details of refractors forming part of the light source
• CPC Class Codes: F21V 3/04 characterised by materials, surface treatments or coatings
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2933/0091 Scattering means in or on the semiconductor body or semiconductor body package H01L33/22 takes precedence
• CPC Class Codes: H01L 33/58 Optical field-shaping elements
• CPC Class Codes: H01L 33/60 Reflective elements

Abstract

An illumination arrangement comprising a plurality of light-emitting semiconductor components (1), arranged in a row, a diffuser (2), which is illuminated by the light-emitting semiconductor components during operation of the illumination arrangement, intermixes light emitted by the semiconductor components during operation and has a light coupling-out area (200) remote from the semiconductor components, and two mutually opposite, reflective longitudinal side faces (3), between which the row of light-emitting semiconductor components is arranged, which run perpendicular or obliquely with respect to the light coupling-out area, and which reflect at least part of the light emitted by the light-emitting semiconductor components during operation in the direction toward the light coupling-out area.

Claims

1. An illumination arrangement comprising:

a plurality of light-emitting semiconductor components, arranged in a row;

a diffuser which is illuminated by the light-emitting semiconductor components during operation of the illumination arrangement, scatters light emitted by the semiconductor components during operation and has a light coupling-out area remote from the semiconductor components; and

two mutually opposite, reflective longitudinal side faces, between which the row of light-emitting semiconductor components is arranged, which run perpendicular or obliquely with respect to the light coupling-out area, and which reflect at least part of the light emitted by the light-emitting semiconductor components during operation in the direction toward the light coupling-out area;

wherein at least one of the light-emitting semiconductor components has an optical device having a radiation exit area having a concavely curved partial region and a convexly curved partial region which at least partly surrounds the concavely curved partial region;

wherein the reflectivity of at least one of the longitudinal side faces in an edge region of the illumination arrangement is lower than the reflectivity of the longitudinal side face in a central region of the illumination arrangement;

in which the longitudinal side face is provided with an absorbent material or an absorbent material composition in the edge region, the absorbent material or the absorbent material composition is applied in the form of absorbent structural units, and the density of the absorbent structural units in the edge region decreases continuously or in stepped fashion in the direction toward the central region.

2. The illumination arrangement as claimed in claim 1, with an interior space in which the light-emitting semiconductor components are arranged, wherein the interior space is at least partially enclosed by the longitudinal side faces,

two mutually opposite transverse side faces which run perpendicular or obliquely with respect to the longitudinal side faces,

the diffuser, and

a carrier opposite of the diffuser.

3. The illumination arrangement as claimed in claim 1, in which the longitudinal side faces are formed in diffusely reflective fashion.

4. The illumination arrangement as claimed in claim 1, in which the longitudinal side faces have a reflectance of 90% or more, preferably of 94% or more.

5. The illumination arrangement as claimed in claim 1, in which the optical device has an optical axis and the optical axis runs through the concavely curved partial region of the radiation exit area.

6. The illumination arrangement as claimed in claim 5, in which the radiation exit area is embodied rotationally symmetrically with respect to the optical axis.

7. The illumination arrangement as claimed in claim 1, which comprises a light-emitting semiconductor component which during operation, emits light having a spectral distribution which brings about a red, orange, yellow, green, blue or white color impression.

8. The illumination arrangement as claimed in claim 7, which comprises at least one group of four light-emitting semiconductor components succeeding one another along the row, one of the semiconductor components of the group in each case emitting red, green, blue and white light, respectively.

9. The illumination arrangement as claimed in claim 1, in which a first one of the light-emitting semiconductor components emits light having a first spectral distribution during operation, and a second one of the light-emitting semiconductor components, which is proximate to the first semiconductor component, emits light having a second spectral distribution, which is different from the first spectral distribution, during operation.

10. The illumination arrangement as claimed in claim 9, in which the diffuser intermixes light from a plurality of the light-emitting semiconductor components which emit light having different spectral distributions.

11. The illumination arrangement as claimed in claim 1, which has, at least one end of the row of light-emitting semiconductor components, a transverse side face which is illuminated during operation at least by the light-emitting semiconductor component arranged at the end of the row and which is intentionally formed such that it is absorbent for a light emitted by the semiconductor component.

12. The illumination arrangement as claimed in claim 11, in which the absorbent transverse side face reflects 30% or less, preferably 15% or less, particularly preferably 5% or less, of the light which is emitted by the semiconductor components and impinges on said side face.

13. The illumination arrangement as claimed in claim 11, comprising an absorber having the absorbent transverse side face, the absorber being produced from a black material or a black material composition or being provided with such a material/material composition.

14. The illumination arrangement as claimed in claim 11, in which the edge region contains the absorbent transverse side face.

15. The illumination arrangement as claimed in claim 1, in which the reflectivity of the longitudinal side face in the edge region increases continuously or in stepped fashion in the direction toward the central region.

16. The illumination arrangement as claimed in claim 1, in which one of the light-emitting semiconductor components is arranged in the edge region.

17. The illumination arrangement as claimed in claim 1, in which the value and/or the change of the reflectivity of the longitudinal side face in the edge region is matched to the luminous flux emitted by the semiconductor component(s) arranged in the edge region during operation.

18. The illumination arrangement as claimed in claim 1, in which the light emitted by the light coupling-out area has an at least approximately Lambertian intensity distribution.

19. The illumination arrangement as claimed in claim 1, in which the light emitted by the light coupling-out area is assigned a uniform chromaticity coordinate.

20. The illumination arrangement as claimed in claim 19, in which the chromaticity coordinate is adjustable.

21. The illumination arrangement as claimed in claim 1, which has a beam shaping device disposed downstream of the light coupling-out area.

22. The illumination arrangement as claimed in claim 21, in which the beam shaping device comprises a lens, a reflector, in particular a mirror, and/or a diffraction grating.

23. The illumination arrangement as claimed in claim 21, in which the beam shaping device has a cylinder- or cylinder-segment-shaped geometry, the center axis of the cylinder running in particular parallel to the light coupling-out area.

24. The illumination arrangement as claimed in claim 21, in which the beam shaping device alters the angular distribution of the radiation emitted by the light coupling-out area.

25. A multiple light module comprising a plurality of illumination arrangements as claimed in claim 1.

26. A luminaire comprising an illumination arrangement as claimed in claim 1.

27. The luminaire as claimed in claim 26, which constitutes a ceiling luminaire.

28. The luminaire as claimed in claim 26, which constitutes a spotlight.

29. The luminaire as claimed in claim 28, in which the spotlight is a floodlight, a table luminaire or a headlight.

30. The illumination arrangement as claimed in claim 1, configured to directly or indirectly illuminate a space.

31. The illumination arrangement as claimed in claim 30, wherein the illuminated space is the interior of a transport means, in particular of an aircraft cabin.